Sexing Collared Flycatchers during autumn needs a cautious approach since many birds are quite intermediate and variation is marked.
Probable male, 1cy, August. The longer uppertail-c and central RR are blackish, indicationg a male. However, caution is needed due to individual variation, and a certain male should preferably show darker black colour than this one. Note that, in fresh plumage, the black uppertail-c often show greyish-olive tips. [CP46962]
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